Cool - I will give inkscape a shot. I really appreciate the offer on the PDF but right now my prototype is a cobbled-together, eyeballed rigging that works; but I need to do it right for this version - which means I have not measured and calculated everything yet.

Thanks a bunch for the link.

The chassis is for an on-board starter I am designing. As you can see - the aluminum I am currently using has a lot of flex (1/16 inch). I will go thicker and add L-shaped aluminum braces across the top as well.